drm/amd/display: Read soc_bounding_box from gpu_info (v2)

[WHY]
We don't want to expose sensitive ASIC information before ASIC release.

[HOW]
Encode the soc_bounding_box in the gpu_info FW (for Linux) and read it
at driver load.

v2: fix warning when CONFIG_DRM_AMD_DC_DCN2_0 is not set (Alex)
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_device.c

@@ -1432,7 +1432,7 @@ static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
 		adev->gfx.cu_info.max_scratch_slots_per_cu =
 			le32_to_cpu(gpu_info_fw->gc_max_scratch_slots_per_cu);
 		adev->gfx.cu_info.lds_size = le32_to_cpu(gpu_info_fw->gc_lds_size);
-		if (hdr->version_minor == 1) {
+		if (hdr->version_minor >= 1) {
 			const struct gpu_info_firmware_v1_1 *gpu_info_fw =
 				(const struct gpu_info_firmware_v1_1 *)(adev->firmware.gpu_info_fw->data +
 									le32_to_cpu(hdr->header.ucode_array_offset_bytes));
@@ -1441,6 +1441,14 @@ static int amdgpu_device_parse_gpu_info_fw(struct amdgpu_device *adev)
 			adev->gfx.config.num_packer_per_sc =
 				le32_to_cpu(gpu_info_fw->num_packer_per_sc);
 		}
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+		if (hdr->version_minor == 2) {
+			const struct gpu_info_firmware_v1_2 *gpu_info_fw =
+				(const struct gpu_info_firmware_v1_2 *)(adev->firmware.gpu_info_fw->data +
+									le32_to_cpu(hdr->header.ucode_array_offset_bytes));
+			adev->dm.soc_bounding_box = &gpu_info_fw->soc_bounding_box;
+		}
+#endif
 		break;
 	}
 	default:

drivers/gpu/drm/amd/amdgpu/amdgpu_ucode.h

@@ -210,6 +210,69 @@ struct gpu_info_firmware_v1_1 {
 	uint32_t num_packer_per_sc;
 };
 
+struct gpu_info_voltage_scaling_v1_0 {
+	int state;
+	uint32_t dscclk_mhz;
+	uint32_t dcfclk_mhz;
+	uint32_t socclk_mhz;
+	uint32_t dram_speed_mts;
+	uint32_t fabricclk_mhz;
+	uint32_t dispclk_mhz;
+	uint32_t phyclk_mhz;
+	uint32_t dppclk_mhz;
+};
+
+struct gpu_info_soc_bounding_box_v1_0 {
+	uint32_t sr_exit_time_us;
+	uint32_t sr_enter_plus_exit_time_us;
+	uint32_t urgent_latency_us;
+	uint32_t urgent_latency_pixel_data_only_us;
+	uint32_t urgent_latency_pixel_mixed_with_vm_data_us;
+	uint32_t urgent_latency_vm_data_only_us;
+	uint32_t writeback_latency_us;
+	uint32_t ideal_dram_bw_after_urgent_percent;
+	uint32_t pct_ideal_dram_sdp_bw_after_urgent_pixel_only; // PercentOfIdealDRAMFabricAndSDPPortBWReceivedAfterUrgLatencyPixelDataOnly
+	uint32_t pct_ideal_dram_sdp_bw_after_urgent_pixel_and_vm;
+	uint32_t pct_ideal_dram_sdp_bw_after_urgent_vm_only;
+	uint32_t max_avg_sdp_bw_use_normal_percent;
+	uint32_t max_avg_dram_bw_use_normal_percent;
+	unsigned int max_request_size_bytes;
+	uint32_t downspread_percent;
+	uint32_t dram_page_open_time_ns;
+	uint32_t dram_rw_turnaround_time_ns;
+	uint32_t dram_return_buffer_per_channel_bytes;
+	uint32_t dram_channel_width_bytes;
+	uint32_t fabric_datapath_to_dcn_data_return_bytes;
+	uint32_t dcn_downspread_percent;
+	uint32_t dispclk_dppclk_vco_speed_mhz;
+	uint32_t dfs_vco_period_ps;
+	unsigned int urgent_out_of_order_return_per_channel_pixel_only_bytes;
+	unsigned int urgent_out_of_order_return_per_channel_pixel_and_vm_bytes;
+	unsigned int urgent_out_of_order_return_per_channel_vm_only_bytes;
+	unsigned int round_trip_ping_latency_dcfclk_cycles;
+	unsigned int urgent_out_of_order_return_per_channel_bytes;
+	unsigned int channel_interleave_bytes;
+	unsigned int num_banks;
+	unsigned int num_chans;
+	unsigned int vmm_page_size_bytes;
+	uint32_t dram_clock_change_latency_us;
+	uint32_t writeback_dram_clock_change_latency_us;
+	unsigned int return_bus_width_bytes;
+	unsigned int voltage_override;
+	uint32_t xfc_bus_transport_time_us;
+	uint32_t xfc_xbuf_latency_tolerance_us;
+	int use_urgent_burst_bw;
+	unsigned int num_states;
+	struct gpu_info_voltage_scaling_v1_0 clock_limits[8];
+};
+
+/* gpu info payload
+ * version_major=1, version_minor=1 */
+struct gpu_info_firmware_v1_2 {
+	struct gpu_info_firmware_v1_1 v1_1;
+	struct gpu_info_soc_bounding_box_v1_0 soc_bounding_box;
+};
+
 /* version_major=1, version_minor=0 */
 struct gpu_info_firmware_header_v1_0 {
 	struct common_firmware_header header;

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -557,6 +557,9 @@ static int amdgpu_dm_init(struct amdgpu_device *adev)
 		init_data.flags.fbc_support = true;
 
 	init_data.flags.power_down_display_on_boot = true;
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+	init_data.soc_bounding_box = adev->dm.soc_bounding_box;
+#endif
 
 	/* Display Core create. */
 	adev->dm.dc = dc_create(&init_data);

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h

@@ -206,6 +206,13 @@ struct amdgpu_display_manager {
 
 	const struct firmware *fw_dmcu;
 	uint32_t dmcu_fw_version;
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+	/**
+	 * gpu_info FW provided soc bounding box struct or 0 if not
+	 * available in FW
+	 */
+	const struct gpu_info_soc_bounding_box_v1_0 *soc_bounding_box;
+#endif
 };
 
 struct amdgpu_dm_connector {

drivers/gpu/drm/amd/display/dc/dc.h

@@ -373,6 +373,7 @@ struct dc_bounding_box_overrides {
 struct dc_state;
 struct resource_pool;
 struct dce_hwseq;
+struct gpu_info_soc_bounding_box_v1_0;
 struct dc {
 	struct dc_versions versions;
 	struct dc_caps caps;
@@ -451,6 +452,14 @@ struct dc_init_data {
 
 	struct dc_config flags;
 	uint32_t log_mask;
+
+#ifdef CONFIG_DRM_AMD_DC_DCN2_0
+	/**
+	 * gpu_info FW provided soc bounding box struct or 0 if not
+	 * available in FW
+	 */
+	const struct gpu_info_soc_bounding_box_v1_0 *soc_bounding_box;
+#endif
 };
 
 struct dc_callback_init {